[deliverable/linux.git] / arch / m68k / amiga / pcmcia.c

/*
** asm-m68k/pcmcia.c -- Amiga Linux PCMCIA support
**                      most information was found by disassembling card.resource
**                      I'm still looking for an official doc !
**
** Copyright 1997 by Alain Malek
**
** This file is subject to the terms and conditions of the GNU General Public
** License.  See the file COPYING in the main directory of this archive
** for more details.
**
** Created: 12/10/97 by Alain Malek
*/

#include <linux/types.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/module.h>

#include <asm/amigayle.h>
#include <asm/amipcmcia.h>

/* gayle config byte for program voltage and access speed */
static unsigned char cfg_byte = GAYLE_CFG_0V|GAYLE_CFG_150NS;

void pcmcia_reset(void)
{
	unsigned long reset_start_time = jiffies;
	unsigned char b;

	gayle_reset = 0x00;
	while (time_before(jiffies, reset_start_time + 1*HZ/100));
	b = gayle_reset;
}
EXPORT_SYMBOL(pcmcia_reset);


/* copy a tuple, including tuple header. return nb bytes copied */
/* be careful as this may trigger a GAYLE_IRQ_WR interrupt ! */

int pcmcia_copy_tuple(unsigned char tuple_id, void *tuple, int max_len)
{
	unsigned char id, *dest;
	int cnt, pos, len;

	dest = tuple;
	pos = 0;

	id = gayle_attribute[pos];

	while((id != CISTPL_END) && (pos < 0x10000)) {
		len = (int)gayle_attribute[pos+2] + 2;
		if (id == tuple_id) {
			len = (len > max_len)?max_len:len;
			for (cnt = 0; cnt < len; cnt++) {
				*dest++ = gayle_attribute[pos+(cnt<<1)];
			}

			return len;
		}
		pos += len<<1;
		id = gayle_attribute[pos];
	}

	return 0;
}
EXPORT_SYMBOL(pcmcia_copy_tuple);

void pcmcia_program_voltage(int voltage)
{
	unsigned char v;

	switch (voltage) {
	case PCMCIA_0V:
		v = GAYLE_CFG_0V;
		break;
	case PCMCIA_5V:
		v = GAYLE_CFG_5V;
		break;
	case PCMCIA_12V:
		v = GAYLE_CFG_12V;
		break;
	default:
		v = GAYLE_CFG_0V;
	}

	cfg_byte = (cfg_byte & 0xfc) | v;
	gayle.config = cfg_byte;

}
EXPORT_SYMBOL(pcmcia_program_voltage);

void pcmcia_access_speed(int speed)
{
	unsigned char s;

	if (speed <= PCMCIA_SPEED_100NS)
		s = GAYLE_CFG_100NS;
	else if (speed <= PCMCIA_SPEED_150NS)
		s = GAYLE_CFG_150NS;
	else if (speed <= PCMCIA_SPEED_250NS)
		s = GAYLE_CFG_250NS;
	else
		s = GAYLE_CFG_720NS;

	cfg_byte = (cfg_byte & 0xf3) | s;
	gayle.config = cfg_byte;
}
EXPORT_SYMBOL(pcmcia_access_speed);

void pcmcia_write_enable(void)
{
	gayle.cardstatus = GAYLE_CS_WR|GAYLE_CS_DA;
}
EXPORT_SYMBOL(pcmcia_write_enable);

void pcmcia_write_disable(void)
{
	gayle.cardstatus = 0;
}
EXPORT_SYMBOL(pcmcia_write_disable);
Commit	Line	Data
1da177e4 LT	1	/*
	2	** asm-m68k/pcmcia.c -- Amiga Linux PCMCIA support
	3	** most information was found by disassembling card.resource
	4	** I'm still looking for an official doc !
	5	**
	6	** Copyright 1997 by Alain Malek
	7	**
	8	** This file is subject to the terms and conditions of the GNU General Public
	9	** License. See the file COPYING in the main directory of this archive
	10	** for more details.
	11	**
	12	** Created: 12/10/97 by Alain Malek
	13	*/
	14
	15	#include <linux/types.h>
	16	#include <linux/jiffies.h>
	17	#include <linux/timer.h>
8b169fa2 AB	18	#include <linux/module.h>
8b169fa2 AB	19
1da177e4 LT	20	#include <asm/amigayle.h>
	21	#include <asm/amipcmcia.h>
	22
	23	/* gayle config byte for program voltage and access speed */
	24	static unsigned char cfg_byte = GAYLE_CFG_0V\|GAYLE_CFG_150NS;
	25
	26	void pcmcia_reset(void)
	27	{
	28	unsigned long reset_start_time = jiffies;
	29	unsigned char b;
	30
	31	gayle_reset = 0x00;
	32	while (time_before(jiffies, reset_start_time + 1*HZ/100));
	33	b = gayle_reset;
	34	}
8b169fa2	35	EXPORT_SYMBOL(pcmcia_reset);
1da177e4 LT	36
	37
	38	/* copy a tuple, including tuple header. return nb bytes copied */
0c79cf6a	39	/* be careful as this may trigger a GAYLE_IRQ_WR interrupt ! */
1da177e4 LT	40
	41	int pcmcia_copy_tuple(unsigned char tuple_id, void *tuple, int max_len)
	42	{
	43	unsigned char id, *dest;
	44	int cnt, pos, len;
	45
	46	dest = tuple;
	47	pos = 0;
	48
	49	id = gayle_attribute[pos];
	50
	51	while((id != CISTPL_END) && (pos < 0x10000)) {
	52	len = (int)gayle_attribute[pos+2] + 2;
	53	if (id == tuple_id) {
	54	len = (len > max_len)?max_len:len;
	55	for (cnt = 0; cnt < len; cnt++) {
	56	*dest++ = gayle_attribute[pos+(cnt<<1)];
	57	}
	58
	59	return len;
	60	}
	61	pos += len<<1;
	62	id = gayle_attribute[pos];
	63	}
	64
	65	return 0;
	66	}
8b169fa2	67	EXPORT_SYMBOL(pcmcia_copy_tuple);
1da177e4 LT	68
	69	void pcmcia_program_voltage(int voltage)
	70	{
	71	unsigned char v;
	72
	73	switch (voltage) {
	74	case PCMCIA_0V:
	75	v = GAYLE_CFG_0V;
	76	break;
	77	case PCMCIA_5V:
	78	v = GAYLE_CFG_5V;
	79	break;
	80	case PCMCIA_12V:
	81	v = GAYLE_CFG_12V;
	82	break;
	83	default:
	84	v = GAYLE_CFG_0V;
	85	}
	86
	87	cfg_byte = (cfg_byte & 0xfc) \| v;
	88	gayle.config = cfg_byte;
	89
	90	}
8b169fa2	91	EXPORT_SYMBOL(pcmcia_program_voltage);
1da177e4 LT	92
	93	void pcmcia_access_speed(int speed)
	94	{
	95	unsigned char s;
	96
	97	if (speed <= PCMCIA_SPEED_100NS)
	98	s = GAYLE_CFG_100NS;
	99	else if (speed <= PCMCIA_SPEED_150NS)
	100	s = GAYLE_CFG_150NS;
	101	else if (speed <= PCMCIA_SPEED_250NS)
	102	s = GAYLE_CFG_250NS;
	103	else
	104	s = GAYLE_CFG_720NS;
	105
	106	cfg_byte = (cfg_byte & 0xf3) \| s;
	107	gayle.config = cfg_byte;
	108	}
8b169fa2	109	EXPORT_SYMBOL(pcmcia_access_speed);
1da177e4 LT	110
	111	void pcmcia_write_enable(void)
	112	{
	113	gayle.cardstatus = GAYLE_CS_WR\|GAYLE_CS_DA;
	114	}
8b169fa2	115	EXPORT_SYMBOL(pcmcia_write_enable);
1da177e4 LT	116
	117	void pcmcia_write_disable(void)
	118	{
	119	gayle.cardstatus = 0;
	120	}
8b169fa2 AB	121	EXPORT_SYMBOL(pcmcia_write_disable);
8b169fa2 AB	122